#include <my_head.h>

int main(int argc, const char *argv[]){
    FILE *fp = fopen("test.txt", "r+");

    char name_1[32] = "张三";
    for(int i = 0; i < strlen(name_1); i++){
        name_1[i] += 1;
    }
    fwrite(name_1, 1, strlen(name_1), fp);

    return 0;
}